InstaBidsWhat is a gate valve?
A gate valve starts or stops fluid flow by moving a disk across the passage. Its gate clears the flow path when fully open; ordinary gate valves are intended for shutoff rather than flow adjustment.
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How does a gate valve open and close during operation?
Turning the handwheel moves the gate along a threaded stem. In the nonrising-stem design described by DOE, the gate travels while the stem stays at the same height. “As the hand wheel on the stem is rotated, the gate travels up or down the stem on the threads while the stem remains vertically stationary.” Source: U.S. Department of Energy, read 2026-10-31. “Its flow control element is a disk or wedge attached to the valve stem.” Source: University of Florida IFAS Extension, read 2026-10-31.
What does the DOE definition of a gate valve describe?
A gate valve is a shutoff valve with a gate-shaped disk that moves across the flow path. DOE describes its motion as linear and its purpose as starting or stopping fluid flow. “A gate valve is a linear motion valve used to start or stop fluid flow; however, it does not regulate or throttle flow.” Source: U.S. Department of Energy, read 2026-10-31.
Can gate valves be used for throttling?
Ordinary gate valves serve fully open or fully closed duty. Leaving the gate partly open makes flow difficult to regulate and can concentrate wear on the disk and seat. “Gate valves should not be used for throttling or controlling liquid streams.” Source: University of Florida IFAS Extension, read 2026-10-31. “Most of the flow change occurs near shutoff with a relatively high fluid velocity causing disk and seat wear and eventual leakage if used to regulate flow.” Source: U.S. Department of Energy, read 2026-10-31.
What are the types of gate valves?
DOE lists four disk designs: solid wedge, flexible wedge, split wedge, and parallel disk. These names describe the internal closure element, rather than a different purpose for the valve. “Classification of gate valves is usually made by the type disk used: solid wedge, flexible wedge, split wedge, or parallel disk.” Source: U.S. Department of Energy, read 2026-10-31.
When would you use a gate valve?
A gate valve suits an on/off isolation task: opening a fluid path or shutting it off. The DOE-sponsored valve-selection report describes this service rather than precise flow adjustment. “These valves (Figure 1) are used primarily to effect flow on/off service.” Source: U.S. Department of Energy, Office of Scientific and Technical Information, read 2026-10-31.
Sources
- DOE Fundamentals Handbook: Mechanical Science, Volume 2, Module 4 — Valves — U.S. Department of Energy; published January 1993; read 2026-10-31.
- Irrigation System Valves — University of Florida IFAS Extension; read 2026-10-31.
- Recommendations for the Selection and Specification of Valves for Balance of Plant Systems in Liquid Metal Reactors — U.S. Department of Energy, Office of Scientific and Technical Information; published September 1985; read 2026-10-31.